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Threading

What Are Threads?

Body Jewelry that has an end ball that screws on and off have threads.  This body jewelry includes straight barbells, curved (bent) barbells, circular barbells, and labret jewelry.  A thread is a spiral ridge that winds either internally or externally around the metal like that on a bolt or the inside of a nut.

What is the difference between Internal and External?

Externally threaded body jewelry has the thread on the end of the barbell, external to the shaft, and it is placed inside a threaded hole in the ball. When externally threaded jewelry is being passed through the piercing, the threads also pass through it, and then the ball is screwed into place.

Externally Threaded Jewelry

 

Internally threaded body jewelry has a threaded hole inside the barbell, internal to the shaft and then an external thread protruding from the ball. When internally threaded jewelry is being passed through a piercing, a smooth barbell passes through the piercing, and then the ball is inserted and screwed into place.

Internally Threaded Jewelry

 

How to know which pieces of Jewelry Thread Together?

Each piece of jewelry has a thread pattern. Common thread patterns are found in the following table. Please note that these thread patterns are the most common for PainfulPleasures jewelry; however you must look at each piece of jewelry to determine what the actual thread pattern is.  A 0.9mm internally threaded ball or gem top will thread onto a 0.9mm internally threaded shaft. A 0.9mm internally threaded ball or gem will NOT thread onto a 0.8mm internally threaded shaft, make sense?

You also must be sure to look at not only the thread pattern but the gauge indicated.  10g through 00g that are Internally Threaded MAY have the same 2.0mm thread pattern. A 2.0mm Internally Counterbored ball meant for a 00g barbell will fit onto a 10g shaft; however the shape of the ball is meant for a 00g barbell. The same goes for all other gauges, so be cognizant when picking ends for your jewelry. 

If you are not sure if two pieces will fit together, check the threading pattern.  If a listing doesn’t have a threading pattern listed, email us at support@painfulpleasures.com, we’ll update the listing and let you know.

The following table has common thread patterns found on PainfulPleasures jewelry. This is just a guide, you should check each piece of jewelry before checking out!

Common Thread Patterns on Non-Custom PainfulPleasures Jewelry

Thread Pattern

Thread Type

Gauge

0.9mm or 0.8mm

Internal

18g or 16g

1.2mm

External

18g or 16g

1.2mm

Internal

14g

1.6mm

External

14g

1.2mm

Internal

12g

1.6mm

External

12g

2.0mm Internal 10g-00g (Counterbored Balls)
1.6mm External 10g
 
Common Thread Patterns on Custom Jewelry
Unlike PainfulPleausures Non-Custom Jewelry, Custom Jewelry often has threading identified with a number-dash-number (#-#).  The first number identifies the size of the thread and the second number refers to the number of threads per inch.  The thread patterns listed in the chart below will only fit with other items with the same respective thread pattern (i.e. Internal "0-80" Threading will only fit with other jewelry with the same Internal "0-80" Threading). Please Note: Internal thread patterns may vary due to the custom manufacturer/machinist, please refer to the product description for actual thread patterns used.
 
Thread Pattern Thread Type Gauge
000-120 Internal Often 18g, 16g (Sometimes 000-120 tops fit with Internal 0.9mm shafts*)
1.2mm Internal 14g
0-80 Internal Often 12g, 10g, 8g
2-56 Internal Often 6g, 4g
4-40 Internal Often 6g, 4g, 2g
8-32 Internal Often 0g, 00g, 11mm, 13mm
* 000-120 internal threading is not guaranteed to fit with 0.9mm internal threading. 000-120 tops may fit 0.9mm shafts sometimes, but are not always flush.